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- Oct 10, 2017 -

Household scissors are generally equal to the arm lever, because of its multiple-use, so the general handshake and the edge of the knife at the same length, however, when used, it can be used as a labor-saving lever by using the blade root, and the scissors of the kitchen shears are long, the blade is shorter, for the labor-saving lever; For the laborious lever. See the length of the blade and the handshake: the blade is a laborious lever, short for a labor lever, as long as an equal arm lever.